And now it looks like the proprietor of the south-west American chicken chain, Gus Fring, is about to reappear in spin-off show Better Call Saul after a mock advert surfaced online, advertising the restaurant / undercover drugs operation.

‘At Los Pollos Hermanos, we know only the best will do for you and your family,’ begins a narrator, as the video follows a tried and tested narrative for fast food advertising – high-quality food on offer, happy children, and welcoming employees.

The 30-second spot then ends with an appearance from Fring, who adds: ‘We are so sure you’ll like them. And if you don’t, they’re on me!’

Or, you may end up dead.

Is Gus back? (Picture: AMC)

Giancarlo Esposito played Gus, the respected businessman who was actually a major drug kingpin who used his chain of restaurants as a cover for methamphetamine distribution, and it was thought that he may have been written in to the second season finale after show runner Vince Gilligan told The Hollywood Reporter that they ‘had a perfect opportunity for someone from our Breaking Bad universe to show up’ but that producer Peter Gould vetoed the idea.

Fans also realised that rearranging each of the first letters from the episode names in season two gave you the phrase ‘FRINGS BACK’.

The star of the award-winning show Breaking Bad Bryan Cranston has also suggested he may return to his character of Walter White for Better Call Saul, the show which follows Walter’s attorney in the years before he represented the most notorious drug dealer in the American south-west.

‘I owe [Breaking Bad and Better Call Saul creator] Vince Gilligan so much. He was my champion to get this role. If they were to call me and say, “We have this idea, we’d like…” I would say, “Yes, you don’t have to finish the pitch. I’m there, what do you want me to do?”,’ he said on The Ellen DeGeneres Show.

‘I’ll do whatever they want because I know how careful they are and proprietary they are with those characters and storylines and it wouldn’t be something, “Oh, isn’t that kind of a stunt casting kind of thing.” It would be something kind of unique and obscure and creative, and I’m all in.’